Hot runner type nonwoven melting and spraying die

Abstract

The invention discloses a hot runner type nonwoven melting and spraying die. The hot runner type nonwoven melting and spraying die comprises a bottom plate, a hot runner manifold, a die head, a spinning plate and two air knives, wherein the bottom plate, the hot runner manifold and the die head are arranged in a transverse direction and are fixedly connected in sequence from top to bottom; a mainhot runner is formed in the hot runner manifold, a sprue bushing is arranged on the bottom plate, the main hot runner communicates with the sprue bushing, and the main hot runner communicates with a bottom groove in the bottom of the die head through a plurality of branch hot runners; the spinning plate is arranged in the die head, a storage tank which corresponds to the bottom groove is arrangedin the spinning plate, and the storage tank communicates with the bottom groove through a shunt filter assembly; a plurality of spinning holes are formed in the bottom of the spinning plate, and the storage tank communicates with the outside through the spinning holes; and the two air knives are located on the front and back sides below the spinning plate. According to the hot runner type nonwovenmelting and spraying die, the bottom groove is uniformly fed through the main hot runner and the branch hot runners in the die head, and the shunting holes are reasonably formed, so that the pressureof hot fluid in the spinning plate is balanced, the flow speed of the spinning holes is consistent, and the nonwoven thickness is uniform.

Description

technical field [0001] The invention relates to the technical field of mold manufacturing, in particular to a hot-runner type non-woven melt-blown mold. Background technique [0002] Non-woven fabrics mostly use polypropylene pellets as raw materials, which are moisture-proof, breathable, flexible, light in weight, non-combustible, and recyclable. Non-woven fabric has no warp and weft, and is light and easy to shape. It is very convenient to cut and sew. It has become the material of choice for mask production. Non-woven fabrics are produced by melt-blown molds. Polypropylene pellets are made into hot fluid in the injection molding machine and injected downward through the spinneret holes of the melt-blown mold. At the same time, the silk threads are pulled out under the action of wind on both sides. With a certain width, thousands of spinneret holes are required to be arranged in a linear manner, and the cavity of the spinneret of the melt blown mold is a strip shape corre...

AI Technical Summary

Problems solved by technology

[0004] In view of the deficiencies of the above-mentioned prior art, the purpose of the present invention is to propose a hot runner type non-woven fabric melt-blown mold to solve the problem that the injection pressure of each spinneret hole of the existing melt-blown mold is inconsistent, resulting in uneven thickness of the non-woven fabric, poor quality problem

Images